socat is an invaluable tool. I first came about it at my first job, where we (just two clueless dudes) had to migrate the mostly undocumented infrastructure of

socat is an invaluable tool. I first came about it at my first job, where we (just two clueless dudes) had to migrate the mostly undocumented infrastructure of about 15 machines at Digital Ocean to Linode, adding replication and failover on top of that (making it ~35 or so machines). During that migration, we tried to minimize downtime, so we made sure that requests made to the old infrastructure were aptly forwarded to the new infrastructure wherever possible, until DNS properly propagated. I found out about socat and we went for it. It worked great, and I marveled at the simplicity of the solution! Ever since then, I've used socat both as an emergency saviour and as an actual service. I seem to recall using it once to go around some docker bug or shenanigans.